<html
  xmlns:wicket="http://wicket.apache.org/dtds.data/wicket-xhtml1.4-strict.dtd">
<head>
<wicket:head>
  <title>Library Demo</title>
</wicket:head>
</head>
<body>
  <h1>Books in the Library</h1>
  <p>The library has <span wicket:id="numBooks">99</span> books by 
  <span wicket:id="numAuthors">11</span> authors.</p>
</body>
</html>